DOMINANT TECHNOLOGIES IN “INDUSTRY 4.0”
ANALYSIS OF OPERATING MODES AND ENERGY EFFICIENT PRACTICES DURING THE OPERATION OF INDUSTRIAL INDUCTION FURNACES WITH NETWORK AND MIDDLE FREQUENCY
- 1 Assist. Prof. Technical University of Gabrovo, Republic of Bulgaria
Among the main problems of the induction furnaces are the clearly manifested worsened power factor during operation, the asymmetry, the deflection and the variance of the supply voltage in their power supply. Induction furnaces in all their operating modes are a non-linear load with significant and varying consumption of active and reactive energy. Compensation devices are set for the heaviest mode of operation – metal melting. There remains a question of the limits of the low inherent power factor for individual regimes, the size of the penalties for this on an annual basis, and the potential energy saving measures taking into account the possibilities of waste heat utilization. In this connection, the task of implementation of modern optimal management according to predefined criteria is current.